Element atomlarining boshqa elementlarning muayyan sondagi atomlarini biriktirib olish xususiyati

=====================================
1, 4
=====================================
2, 4
++++++++++++++++++++++++++++++++++++

Qaysi moddaning suvli eritmasiga potash qo‘shilganda gidroliz susayadi?

===============================
FeBr₃
======================================
CrCl₃
=====================================
Al₂(S04)_з
=============================
# Na₂S
++++++++++++++++++++++++++++++++++
Qaysi modda HNO₂ bilan oksidlanish qaytarilish Pb(NO₃)₂ bilan almashinish reaksiyasiga kirishadi?
===============================
# KI
=================================
Ca(NO3)2
====================================
Zn
=======================================
NH3
++++++++++++++++++++++++++++++++++++
40. Quyidagi ionlarning qaytaruvchanlik xossasi qanday o‘zgaradi?
===============================
1-b; 2-a
===================================
# 1-b; 2-b
===================================
1-a; 2-a
====================================
1 -a; 2-b
+++++++++++++++++++++++++++++++++++

41. X⁰ + Y²⁺ = X²⁺ + У⁰ reaksiya uchun to‘g‘ri bo‘lgan hukmni toping.

=====================================
qaytaruvchi ion – Y²⁺
===========================================
qaytarilgan ion - Y²⁺
========================================
oksidlovchi ion - X²⁺
==========================================
# oksidlangan ion - X^{2+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
42. Qaysi tuz eritmasida kislotali muhitni ta ’minlash gidroliz reaksiyasini susaytiradi?
=================================
CaSO4
================================
KCN
================== =============
# MgSO4